Discrepancy in A-Radio max power among 1242AG, RM-21/22
I have a case open with the TAC, but I was wondering if anyone has seen differing Allowed Power Levels in "sh controller d1" output across different A-Radios (see below). I noticed this when WLSE would only change half my 1242s A radios to assumed max power (15dB/30mW). I started to look at the other A-Radios (RM-21/22) and saw more divergence in Max Power. Some had 17dB/50mW, others 11dB/13mW What's going on?
Two AP1242A radios with different max power levels:
Radio AIR-AP1242A, Base Address 0016.9c02.c870, BBlock version 0.00, Software version 5.80.15
Serial number: ALP10064RC1
Number of supported simultaneous BSSID on Dot11Radio1: 8
Re: Discrepancy in A-Radio max power among 1242AG, RM-21/22
** Answer from TAC Engineer **
This makes sense. I thought this might be related to the UNI bands somehow. I changed the channels on the 1242s and saw the results you mention below.
So the upshot is:
5 channels @50mW/17dB
1 channel @25mW/14dB
6 channels @13mW/11dB.
Theres more power available in these middle/upper domains than whats allowed on these radios, even with a 9dBi antenna. Is this because theyre for indoor use?
The FCC has allocated 300 MHz of spectrum for unlicensed operation in the 5 GHz block, 200 MHz of which is at 5.15 MHz to 5.35 MHz, with the other 100 MHz at 5.725 MHz to 5.825 MHz. The spectrum is split into three working "domains." The first 100 MHz in the lower section is restricted to a maximum power output of 50 mW (milliwatts). The second 100 MHz has a more generous 250-mW power budget, while the top 100 MHz is delegated for outdoor applications, with a maximum of 1-watt power output.
This impacts our choice of APs. I was for the 1242AG since it has more memory, newer processor and radios, but we might have to re-think the 1232AG as a better option for RF coverage.
How about making a 1242 with an RM-21 slot? ;)
Thanks Young. Please close this case out. At least I found my first bug.
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